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ADVANCED OXIDATION OF A NONIONIC SURFACTANT: EXAMINATION OF THE DEGRADATION PRODUCTS – ACUTE TOXICITY RELATIONSHIP

Year 2013, Volume: 31 Issue: 4, 508 - 516, 01.12.2013

Abstract

Degradation products formed during removal of an aqueous nonylphenol ethoxylate compound (NP-10) by the H2O2/UV-C, Fenton (Fe2+/H2O2) and photo-Fenton (Fe2+/H2O2/UV) advanced oxidation processes and their relationship with the acute toxicity toward Vibrio fischeri photobacteria were investigated. Polyethylene glycols with 3-8 ethoxy units, aldehydes and carboxylic acids were identified as the primary degradation products of the studied treatment processes. A strong correlation was found between the acute toxicity and the aldehydes and carboxylic acids formed during the H2O2/UV-C and photo-Fenton processes. Higher concentrations of aldehydes and carboxylic acids in the H2O2/UV-C process (1.24 and 32 mg L-1, respectively) than in the photo-Fenton oxidation (0.36 and 21 mg L-1, respectively) were speculated to cause the higher inhibitory effect (24% relative inhibition) observed in the H2O2/UV-C process. The Fenton process was rather inefficient for the removal of NP-10 (20% removal), resulting in the generation of only low concentrations of degradation products (0.14 mg L-1 aldehyde and 4.58 mg L-1 carboxylic acid) and a residual toxicity (10% relative inhibition) nearly at the same level with that of the untreated pollutant (9% relative inhibition). A positive relationship was evidenced between the concentration of degradation products and the level of acute toxicity.

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There are 22 citations in total.

Details

Primary Language English
Subjects Environmental Engineering
Journal Section Research Articles
Authors

Akın Karcı This is me

İdil Arslan Alaton This is me

Miray Bekbölet This is me

Publication Date December 1, 2013
Submission Date April 4, 2013
Published in Issue Year 2013 Volume: 31 Issue: 4

Cite

Vancouver Karcı A, Arslan Alaton İ, Bekbölet M. ADVANCED OXIDATION OF A NONIONIC SURFACTANT: EXAMINATION OF THE DEGRADATION PRODUCTS – ACUTE TOXICITY RELATIONSHIP. SIGMA. 2013;31(4):508-16.

IMPORTANT NOTE: JOURNAL SUBMISSION LINK https://eds.yildiz.edu.tr/sigma/